No product was sent to me for free or discount. I bought them for full price.Saying that - I bought 3 of these lights. I have 2 older releases of similar Ulanzi lights, but always hated having to find and use the color gels to achieve a colored lighting. With these those are a thing of the past.Now I get everything set up, position my lights and then I can just cycle through the colors until I find the one that pops.The lights have 2 modes, RGB and Correlated Color Temperature (CCT). The CCT mode has a wide range of white light warmth. However, I have other Ulanzi lights for white light.I mainly got them for the RGB ability. The lights have a nice range of colors, starting with red on one end and going through all of the colors to end up at a nice violet at the other end.These lights have an additional brightness setting as well, which goes from 0 to 100%. They get extremely bright. That is what I wanted, bright vivid color lighting.In my opinion, these lights were a good value for my money. I have expensive ($300 for 2 lights & some accessories) rechargable lighting gear, which has all sorts of attachments for them. Those are great, and I primarily use them for getting light in specific areas of photographs. These Ulanzi Lights are amazing for general lighting purposes. They put out a lot of light in a ton of different colors.For their price and utility I will be picking up more in the future!